Wiseco Top End Bearing 20 x 25 x 21.8 mm for Polaris 440 Pro X 2001-2003 B1039
Part Number: 09240124WISECO
- SKU:
- 09240124
- MPN:
- B1039
- Condition:
- New
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
Description
Top-end bearing wear is one of the most common culprits behind loss of compression and reduced engine efficiency in high-mileage sleds. The Wiseco B1039 is a direct OEM replacement engineered to restore full bearing function and prevent catastrophic piston seizure during aggressive acceleration. If you're rebuilding your Polaris 440 Pro X, this bearing is non-negotiable for reliable performance.
Built from premium high-silicon aluminum alloy with case-hardened surfaces, this bearing delivers the precision fitment and durability required for sustained high-RPM operation. Installation is straightforward during a standard top-end rebuild—no machine work needed.
- Fitment: Polaris 440 Pro X (2001–2003)
- Dimensions: 20 x 25 x 21.8 mm
- Material: High-silicon aluminum alloy
- Case-hardened construction
- Precision-engineered tolerances
- Optimized for high-RPM operation
- Reduced friction design
- OEM-equivalent quality
- Bolt-on installation
- MPN: B1039
Specs
APPLICATION: |
PISTON |
INSIDE DIAMETER METRIC: |
20 MM |
MATERIAL: |
ALUMINUM |
OUTSIDE DIAMETER METRIC: |
25 MM |
UNITS: |
EACH |
LENGTH METRIC: |
21.8 MM |
PRODUCT NAME: |
BEARING |
MATERIAL: |
SILICONE |
RIDING STYLE: |
WATERCRAFT |
Fitment
Fitment for Wiseco Top End Bearing 20 x 25 x 21.8 mm for Polaris 440 Pro X 2001-2003 B1039
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